Who owns Innospec Inc.?
Institutional ownership of IOSP from SEC Form 13F filings across 200 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
200
13F holders
$1.56B
value, 2026 filers
79.7%
of shares outstanding (19.6M sh)
37
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of IOSP's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.4M | $356.6M | 0.0% | 17.8% | +13.0% |
| 2 | Allspring Global Investments Holdings, LLC | 1.9M | $154.7M | 0.2% | 7.7% | -18.3% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.9M | $153.4M | 0.0% | 7.6% | +1.3% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 1.1M | $90.2M | 0.0% | 4.5% | -50.3% |
| 5 | Nuveen, LLC | 755,723 | $61.5M | 0.0% | 3.1% | +17.5% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 666,589 | $54.3M | 0.0% | 2.7% | +5.7% |
| 7 | GOLDMAN SACHS GROUP INC | 662,210 | $53.9M | 0.0% | 2.7% | +34.6% |
| 8 | VICTORY CAPITAL MANAGEMENT INC | 660,110 | $53.7M | 0.0% | 2.7% | -23.7% |
| 9 | TWO SIGMA INVESTMENTS, LP | 568,709 | $46.3M | 0.0% | 2.3% | -4.1% |
| 10 | BROWN ADVISORY INC | 408,468 | $33.2M | 0.1% | 1.7% | +37.8% |
| 11 | JPMORGAN CHASE & CO | 370,574 | $30.0M | 0.0% | 1.5% | -13.0% |
| 12 | Sixth Street Partners Management Company, L.P.NEW | 355,658 | $28.9M | 5.0% | 1.4% | new |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 355,658 | $28.9M | 0.0% | 1.4% | -2.8% |
| 14 | NORTHERN TRUST CORP | 303,044 | $24.7M | 0.0% | 1.2% | +6.6% |
| 15 | Qube Research & Technologies Ltd | 285,849 | $23.3M | 0.0% | 1.2% | -29.7% |
| 16 | ACADIAN ASSET MANAGEMENT LLC | 273,999 | $22,287 | 0.0% | 1.1% | +123.6% |
| 17 | Assenagon Asset Management S.A. | 272,782 | $22.2M | 0.0% | 1.1% | -44.4% |
| 18 | BANK OF AMERICA CORP /DE/ | 235,742 | $19.2M | 0.0% | 1% | -18.9% |
| 19 | MORGAN STANLEY | 230,793 | $18.8M | 0.0% | 0.9% | -2.0% |
| 20 | Public Sector Pension Investment Board | 169,154 | $13.8M | 0.0% | 0.7% | +90.7% |
| 21 | D. E. Shaw & Co., Inc. | 165,746 | $13.5M | 0.0% | 0.7% | -42.2% |
| 22 | VANGUARD FIDUCIARY TRUST CO | 163,715 | $13.3M | 0.0% | 0.7% | +1.8% |
| 23 | SEI INVESTMENTS CO | 156,051 | $12.7M | 0.0% | 0.6% | -10.4% |
| 24 | UBS Group AG | 154,001 | $12.5M | 0.0% | 0.6% | -72.8% |
| 25 | MACKENZIE FINANCIAL CORPNEW | 144,677 | $11.8M | 0.0% | 0.6% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.